[Docs] Try fixing the tutorial toctree

Unorphan the old tutorial and reference every page in the index
explicitly. This should hopefully make Sphinx generate correct
hyperlinks now.
diff --git a/llvm/docs/tutorial/index.rst b/llvm/docs/tutorial/index.rst
index 1a5277d..8aa4518 100644
--- a/llvm/docs/tutorial/index.rst
+++ b/llvm/docs/tutorial/index.rst
@@ -6,14 +6,13 @@
 ===============================================
 
 .. toctree::
-   :titlesonly:
-   :glob:
-   :numbered:
+   :hidden:
 
    MyFirstLanguageFrontend/index
 
-This is the "Kaleidoscope" Language tutorial, showing how to implement a simple
-language using LLVM components in C++.
+:doc:`MyFirstLanguageFrontend/index`
+  This is the "Kaleidoscope" Language tutorial, showing how to implement a simple
+  language using LLVM components in C++.
 
 Kaleidoscope: Implementing a Language with LLVM in Objective Caml
 =================================================================